Documentation: fix lg-laptop.rst warnings

Fix markup warnings by inserting blank lines.
Also correct one typo.

Documentation/laptops/lg-laptop.rst:2: WARNING: Explicit markup ends without a blank line; unexpected unindent.
Documentation/laptops/lg-laptop.rst:16: WARNING: Unexpected indentation.
Documentation/laptops/lg-laptop.rst:17: WARNING: Block quote ends without a blank line; unexpected unindent.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Matan Ziv-Av <matan@svgalib.org>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>